www射-国产免费一级-欧美福利-亚洲成人福利-成人一区在线观看-亚州成人

US EUROPE AFRICA ASIA 中文
Business / Industries

The craft of mercury-in-glass thermometers in China

Updated: 2015-02-23 14:12 By He Yini (chinadaily.com.cn)
Comments

Measuring your body temperature with a glass thermometer is pretty handy, but making the instruments is not easy.

A finished mercury-in-glass thermometer requires at least 25 intricate steps including blending the mercury bulb, crafting the neck of the tube and narrowing the throat.

Sadly, such thermometers may soon be phased out as the World Health Organization has slated to ban them for medical use by 2020 due to the toxicity of mercury. Some manufacturers have thereforestarted to use galinstan, a liquid alloy of gallium, indium, and tin, as a replacement for mercury.

Before they go, let's take a quick look at how to make a glass thermometer at a medical equipment manufacturer in Yancheng, Jiangsu province.

The craft of mercury-in-glass thermometers in China

A woman presents finished glass thermometers at Jiangsu Yuyue Medical Equipment & Supply Co Ltd in Jiangsu province on Feb 3. [Photo / IC]

Previous Page 1 2 3 4 5 6 7 8 9 10 Next Page >>|

Photo
8.03K
...
主站蜘蛛池模板: 亚洲成人欧美 | 免费一级毛片在线播放 | 久草免费在线色站 | 国产毛片基地 | 在线看精品 | 小明日韩在线看看永久区域 | 亚洲毛片免费视频 | 日韩毛片欧美一级国产毛片 | 欧美精品99| 国产自偷自拍 | 国产三及 | 国产99视频精品免费观看7 | a毛片免费全部播放完整成 a毛片免费全部在线播放毛 | 国产亚洲小视频 | 欧美三级一区二区三区 | 天天澡天天碰天天狠伊人五月 | 日本精品一区二区三区在线视频一 | 中国人免费观看高清在线观看二区 | 久久综合九九亚洲一区 | 欧美aaa性bbb毛片 | 日韩中文字幕在线观看视频 | 日韩专区亚洲精品欧美专区 | 高清国产一区 | 免费看欧美一级a毛片 | 久久久www成人免费精品 | 免费人成网站 | 性盈盈影院影院67194 | 日本在线观看网址 | 国产成人亚洲毛片 | 美国一级毛片视频 | 免费看美女无遮掩的软件 | 国产欧美日韩综合精品一区二区三区 | 成人免费毛片一区二区三区 | 日本一级毛片免费 | 久久国产影院 | 亚洲欧美日韩国产一区二区精品 | 国产一区二区三区四区波多野结衣 | 国产专区第一页 | 女人张开腿给男人桶爽免费 | 国产成a人亚洲精v品久久网 | 亚洲精选在线 |